temp = int(input())

print("Yes" if temp>= 30 else "No") temp = int(input()) temp int(input()) int input() input print("Yes" if temp>= 30 else "No") print "Yes" if temp>= 30 else "No" temp>= 30 temp 30 "Yes" "No" temp = int(input()) int(input()) temp
temp = int(input())

print("Yes" if temp>= 30 else "No")